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Intrinsic flame retardant two-component modified melamine formaldehyde foam and its preparation method and application

A melamine formaldehyde, two-component modification technology, applied in the field of polymer foam, can solve the problems of complex preparation process, small improvement in performance, and inconspicuous effect, and achieve simple process, large improvement in brittleness, and strong operability Effect

Active Publication Date: 2017-01-11
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent US3093600 improves the elasticity of foam by using polyols, but the effect is not obvious; patent CN101735555A discloses the modification of melamine formaldehyde foam by materials such as polyvinyl alcohol (PVA), which has achieved certain effects, but its preparation process is complicated. The production cost is high. Due to the limitation of its process, the weight content of PVA connected is 5-12%, and the small amount of connected flexible chain will inevitably lead to little improvement in performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get 6.9g of PVA and dissolve it in 40.0g of deionized water, heat and stir to dissolve for 0.5 hour to obtain PVA solution; add 10.0g of melamine in a 250ml three-necked flask equipped with a stirrer, thermometer, and condenser, and add 17.8ml of 37% formaldehyde solution; when the temperature reaches 70°C, adjust the pH value to 8-9, and the temperature rises to 80°C. After reacting for 15 minutes, add the dissolved PVA solution, and then pass gas into the three-necked flask, and use the flow of gas to dissolve the PVA. The moisture flows out with the gas. Continue the heat preservation reaction for 30 minutes to obtain the melamine formaldehyde prepolymer; take 10 melamine formaldehyde prepolymer and pour it into the mold, add 0.4g alkylphenol polyoxyethylene ether (OP-10), stir well and add 3.0ml n-pentyl Arane and 0.6ml hydrochloric acid, add 0.6g KH550 dropwise, stir until white foam appears, put it in a 70°C oven for foaming and solidification, and obtain intrinsi...

Embodiment 2

[0029] Dissolve 8.6g of PVA in 40.0g of deionized water, heat and stir to dissolve for 1 hour to obtain a PVA solution; add 10.0g of melamine to a 250ml three-necked flask equipped with a stirrer, thermometer, and condenser, and add 17.8ml of 37% formaldehyde solution; when the temperature reaches 70°C, adjust the pH value to 8-9, and the temperature rises to 85°C. After reacting for 25 minutes, add the dissolved PVA solution, and then pass gas into the three-necked flask, and use the flow of gas to dissolve the PVA. The moisture in the mixture flows out with the gas; continue the heat preservation reaction for 30 minutes to obtain the melamine formaldehyde prepolymer; take 10 melamine formaldehyde prepolymer and pour it into the mold, add 0.8g sodium dodecylbenzene sulfonate, stir well and then add 4.0 di Ethyl chloride and 0.8ml formic acid, add 0.6g KH550 dropwise, stir until white foam appears, put it in a 90°C oven for foaming and solidification, and obtain intrinsically f...

Embodiment 3

[0031] Dissolve 10.3g of PVA in 60g of deionized water, heat and stir to dissolve for 1 hour to obtain a PVA solution; add 10.0g of melamine to a 250ml three-necked flask equipped with a stirrer, a thermometer, and a condenser tube, and add 18.8ml of 37% formaldehyde solution When the temperature rises to 70°C, adjust the pH value to 8-9, and the temperature rises to 85°C. After reacting for 15 minutes, add the dissolved PVA solution, and then feed gas into the three-necked flask, and use the flow of gas to dissolve the PVA. Moisture flows out with the gas; continue the heat preservation reaction for 30 minutes to obtain the melamine formaldehyde prepolymer; take 10 melamine formaldehyde prepolymer and pour it into the mold, add 1.2g of alkylphenol polyoxyethylene ether (OP-10), stir well Add 5.0ml of dichloroethane and 1.2ml of formic acid, add dropwise 0.9g of KH550, stir until white foam appears, put it in a 70°C oven to foam and solidify, and obtain intrinsically flame-reta...

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Abstract

The invention belongs to the field of polymer foam, and discloses intrinsic flame-retardant modified melamine formaldehyde foam as well as a preparation method and applications thereof. The preparation method utilizes flexible segments of PVA (polyvinyl alcohol) and characteristics of containing active amino and having cohesiveness of a silane coupling agent KH550; by using a special process, PVA and KH550 can participate in the reaction of melamine formaldehyde, so that PVA and KH550 chains are embedded between rigid groups of melamine formaldehyde, so as to improve the characteristics that the foam is easy to be brittle and pulverized and has poor toughness in the case of meeting flame retardant requirements. According to the invention, the prepared melamine formaldehyde foam has good flexibility, has a certain compressive strength, and has the oxygen index larger than 34% and the elastic recovery rate up to 90%.

Description

technical field [0001] The invention belongs to the field of polymer foams, and in particular relates to an intrinsic flame-retardant two-component modified melamine-formaldehyde foam and a preparation method and application thereof. Background technique [0002] Melamine foam is made of melamine resin as raw material, with emulsifier, foaming agent, curing agent and other additives through a special foaming process. Will burn, therefore, melamine foam without additional flame retardants. Since the composition of the melamine foam material contains nitrogen, once it starts to burn, it will immediately decompose and produce a large amount of nitrogen, which delays the burning speed, and the smoke produced during the burning process is much less than that of ordinary foam plastics. Compared with general foams such as polyolefin, polyurethane, and polystyrene, which have a relatively high market share in the existing market, melamine foam has the advantages of low density, fla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/32C08J9/14C08G12/40
Inventor 吴昆罗富彬吕满庚李因文郑健郭会龙赵强
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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